Electrical selective apparatus.



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Ikmrmr 'MW MW No;.'754,689. PATENTED MAR. 15, 1904. F. D. PEARNE Ac G.KRUM. ELECTRICAL SELECTIVE APPARATUS. APPLIQATIOH FILED FEB. a. 1902.

N0 MODEL.

I a I V X N-o.'754.s"89. PATENTED MAR. 15,1904. E. 1), PEARNE & c. E.KRUM. ELECTRICAL SELECTIVE APPARATUS.

APPLICATION FILED FEB.3. 1902. H0 MODEL. 3'SHEETS-SHE3T 3.

lie 7 A1 7% /5 1 tion on line 8 8 of Figs. 1 and 7. 4 diagrammatic viewof the circuits.

UNITED STATES Patented March .15, 1904.

PATENT OFFICE.

FRANK I). PEARNE AND OHARLEs L. KRUM, OF CHICAGO, ILLINOIS, AssIeNoRs TOPEARNE ELECTRIC AND MANUFACTURING O MRANY, or OHIOAeO, ILLINOIS, ACORPORATION.

ELECTRICAL SELECTIVE APPARATUS- SPEGIFIGATIONfOrming part of LettersPatent No. 754,689, dated March 15, 1904. I Application filed Pebriiary3, 1902. Serial No- 92,264. (No model.)

To all whom it may concern:

Be it known that we, FRA K D. PEARNE and CHARLEs L. K UM, citizens ofthe United States, and residents of Chicago, in the county of Cook andState of Illinois, have jointly invented certain new and usefulImprovements in Electrical Selective Apparatus, of which the followingis a full, clear, and exact descrip- .tion. I v The invention relates tothe electrical select ive apparatus, and seeks to'provide a selectiverelay which will be extremely sensitive, positive and rapid inoperation, and by which one of two or three branch circuits may beselected 5 or closed',-and to provide in conjunction therewith amagnetic lock arranged to hold the selected branch circuit in a closedcondition.

. The improved apparatus is particularly designed to beone of severalsimilar devices cated in a line-circuit and used to control a series oflocal branch circuits operating a set of signals, the separate parts ofa printingtelegraph or electricaltype-writer, or other similar receivingdevices.

"The invention consists in'the features set forth in the followingdescription, illustrated in. the accompanying drawings, and moreparticularly pointed out in-the appended claims.

In the drawings, Figure 1 is a plan view of 3 the improved apparatus.Fig. 2 is a horizontal section on line 2 2 of Fig. 3. Fig. 3 is a sideelevation, parts being broken away and ip'arts shown in section. Fig. 4is a partial Y horizontal 'section on line 44 of Fig. 3. Fig. 355 is avertical section on line ,5 5 of Fig. 3.

Fig. 6 is an enlarged detail section on line 6 6 of Fig. 1. Fig. 7 is avertical section on line 7 7 of Fig. 1. Fig. 8 is a partial verticalsee- Fig. 9 is a N ear one end of a base-board A are firmly securedtheuprights or corner-supports 10,

upon which is -fixed a top plate 11, of insulating-imaterial. Thecorner-supports 10 are preferably of brass, and each side pair isconnected intermediate the ends of the supports by a side frame-bar 12,which is also of brass and preferablyjcast-or formed in one piece with.the connected corner-supports. Afieldmagnet B is secured in transverseposition to a pair of central downwardly'projecting lugs 13 upon sidebars 12. This field-magnet is formed of magnetsteel and its ends bentupwardly and then inwardly to form the polepieces 14 and 15, located inthe same horizontal plane. The bar B is permanently magnetized, with thepoles-14 and 15 of like polarity and with a central unlike pole-that is,if the central part of the bar (marked N) is the northpole theoppositely-facing ends (marked S) are south poles. An armature C, ofsoft iron, extends between and in line with the oppositely-dis'posedlike poles 14 and 15 and is fixed to a vertically-disposed center pivotor spindle 16, the lower cone-shaped end of which is stepped orjournaled within an opening formed in central position upon the top faceof the field-magnet B and at its unlike pole. The spindle 16 extendsupwardly through an opening in the top plate 11, and its upperconeshaped end is journaled within the end of a screw 17, which isadjustably threaded through a piece 18, of inverted,-Ushape, fixed tothe upper face of plate. llandheld thereby some distance above the topplate..- A lock-nut 10 serves. to hold the bearing screw 17 in itsproper adjusted position.

A head or block 20, of insulatingmaterial, is

fixed to the upper end of-spindle 16 intermediate the plate 11 andscrew-bearing 17 and serves as a support for a metal .contact or switcharm D. Upon a block 21, of insulating material, fixed to the under sideof top plate 11, are mounted three spring strips or contacts d, ii, and(P, which project upwardly through an opening 23 in top plate 11 andsurround the end of the contact-arm D. Each of these spring-stripsis-preferably brazed to or fixed in any suitable manner at its lower endto a spring-strip 24, which also projects upwardly through the opening23 in the top plate. The upper ends of the spring-contacts 1d, d, and dare bent inwardly, as shown, and spaced apart from the upper ends of thespringstrips 24, while a thumb-screw 25, adjustably gage the upper endof each of the springstrips 24. The contacts d, d, and 0Z v are thusthreaded through a lug 26, is arranged to en yieldinglyand adjustablyheld in position,and the adjusting thumb-screws are situated at theupper portion of the apparatus, and thus are easily accessible.

With the arrangement of field-magnet and armature above described thelines of force will pass from the north pole of the ma, t through thelower portion of the spindle 10', in direct contact therewith, and thendivide and pass in opposite directions through the armature C to thesouth poles 1e and 15. Armature (J is thus polarized by the magneticactionpf the field-magnet B and held in normal central position inline-with the like poles lei and 15. So, also, the contact-arm Disnormally held in central position in engagement with the contact-springd and out of engagement with the contact-springs d and By rocking thearmature in one or the other d1- rection contact with spring d will bebroken and contact made spring 02 I For rocking armature Q a pair ofelectromagnets E E are mounted upon. either side of the armature U andwith their opposite pole-pieces respectivelyadjacent the opposite endsof the armature. Each of these actuating magnets is preferably formed ofa single spool 22, transversely arranged between the side framepieces12, and to the soft-iron cores 27 of which are swaged or otherwisefirmly tired in. placethe pole-pi'eces 28, which project inwardly towardthe armature C.

in order to adjust the sensitireness of the relay, the magnetsare-movably supported between the side bars 12, the pole-pieces 28 beingmounted-to slide in'slots or guideways "29, formed in the side-bars 12.To the ends oi each of the cores 2'6 oi the spools 22 are plnned orotherwise rigidly fixed in position the up wardly extending lng-pieces30, througheach to and ne t veness of the relay thus quickly and accu-.

rately ad usted.

adiacent side pair of which are threaded the opposite ends of a rightand left handed screw 31. Each of the screws 31 is held againstlongitudinal movement by a'centerlug 32 upon the'adjacent cross oar 12-,which extends between and engages a pair of collars 33 upon screw 31.Right and ieft hand screws 31 are of similar size and pitch andconnected by a gear-chain 34, passing over a pair of sprockets 35, fixedto the outer ends of the screws, and one of the screws is provided, asshown, with an adjustingthumb nut 36. or poles of both of theactuating-magnets E E may be adjusted simultaneously and equably thearmature U 'andthe sensi- Upon the opposite end of the'base-board A issecured by screws-37 an upright ti -shaped permanent field-magnet E,having inwardlyturnednnlike pole-pieces 38 and 39. A-crossstrip rogerinsulating ma erial, extends be e ni'e'ces dia -and pieces by theinterposed blocks 4-1.

with either springd or a in one or the other direction.

By thismeans both ends 1 spring ct,

assess A binding-post 2 is secured in central position in thecross-strip i0, and to its lower end is fixed a yoke 13, in which iscentrally pivoted an armature Gr, extending between the pole-pieces 38and 390i the field-magnet E, so as to be held in normal central positionby the attrac tion of the magnet.

- Metallic contact-pins 4A; and are adjustably threaded through metallicsleeves 4L6, fixed in the opposite ends of the insulatingstrip 40, thelower ends of the pins forming contact-points in position to be engaged,respectively, by the opposite ends of armature Gr when the latterisrocked in one or the other direction. A contact-pin L7, fixed centrallyto the armature G and extending downwardly therefrom, normally engages abent springcontact 48, which is fixed to a lug on a bind ing-post 49,mounted upon the base-board-A. An adjusting-screw for spring-contact 4:8is threaded through a second lug on the hinding-post 4:9 and engages thespringcontact, as shown.

Upon a brass piece 51, secured to the horizontal portion of magnet E,are fixed two separate electromagnets H H, arranged adjacent theopposite ends of armature G, so that by energizing one or the other ofsaid magnets the armature may be rocked into en- 'gagement either withcontact 44; or with contact 45, while the contact between pin 47 andspring 48 is broken.

At one end of base-board A in line with binding-post 49 are mounted thebindingposts 52, 53, 5e, 55, and 56, and at the opposite end of thebase-board adjacent the relay are fixed thebinding-posts 57 and 58.

I In Fig. 9 the line-circuit may be traced by wire 59 to binding-post57, by wire 60 to relaymagnet E, thence through the coil of this magnetand by wire 61 to the relay-magnet E, and through its coil and by wire62 to binding-post 58, and from thence back by wire 63 over the line orto the next succeeding relay, if more than one are employed. Lineimpulses of the proper strength andoi opposite polarity will serve tomove armature When the current passes in one-direction, one end of polarized armature C will, for example, be attracted toward the adjacentpoleof magnet E and re pelled by theadjacent pole of magnet E, while itsopposite end is repeiled by the adjacent pole of magnet E and attractedby adjacent pole of magnet E and the armature rocked to I bring contact-arn1 D, against contact- When the line impulse passes in the reversedirectiomthe effect of the relay-magnets E and E upon armature C will bethe reverse of that I abore stated, and the armaturewill be rocked tobring contact-arm D into engagement with lit is thus obvious that t e Econtact-spring 0Z ezi ects e. c

at a single station or located at a separate station and usedfor avariety of purposes. Each of these devices is includedinaseparate branchcircuit, in this instance separate branch circuits of a battery K. Inthe nor mal position of armature (l of the relay the circuit frombattery K is traced by wire 64 to binding-post 55', by wire 65 tocontact-arm D,

thence by contact-spring dand wire 66 to binding-post 56 and by wire 67to the next succeeding relay.

50 represents the return-wire to the battery. ,In the normal position ofarmature Gr a branch of battery K in this instance is closed through themember '1 of the receiv ing apparatus, as follows? By wire 64 andbranchwire 68 to aspring-held make-andbreak switch L, normally engaginga'contact 69, from thence by wire 70 tobindingpost 54, by wire 71 tobinding-post {L2, thence by armature G and contact-pin 47 tocontactspring 455, thence by binding-post 49 and wires 7 2, 7 3, andthrough thereceiving device I back to battery K.

' When the armatureC is rocked by a line impulse as describedforexample, against the contact dthe circuit from battery K is traced bywire 64 to binding-post 55, by wire to contact-arm I), bycontact d andwires 7 1 and 7 5 through the coilof'magnet H to binding post 52, thenceby wires 76, 77, and 50 through receiving device I back to net H is thusenergized, and the amature G,

' which responds to the slightest impulse passing through thebranchcircuit, is rocked into engagement with contact t i and the contactbetween pin 47 and" spring 48 is broken. The branch circuit through thereceiving member I is then closed through a shunt around the contact-armD as follows: .from battery K by wires64s'and 68 to make-andbr'eakswitch L, by contact 69,'wire 7 0 to binding-post 54.1,

by wire 71 and binding-post 42 to armature Gr, by contact 44 and wires78 and 7 4 through the coil of magnet H, thence by wires 7 5 to binding-post 52 and by wires 76, 77,'and 50 through the receivingdevice Iback to battery K;

When the lineimpulses ofopposite polarity rock armature 'O'to bringcontact-armD into engagement with the spring-contact 63 the branchcircuit through receiving device I and locking-magnet His closed in asimilar manner. The line impulses of opposite pobattery K. Maglaritythus operate through the medium of the sensitive relay to select one oftwo branch circuits, and the slightest impulse through the selectedbranch serves, through the medium of the locking-magnet H H,to hold saidbranch circuit'in a closed condition through the selected receivingdevice until broken at the make-and-break switch L. The latter may beactuated automatically'i'rom the separate receiving devices I and I orotherwise, as desired.

When the line impulses cease, armature C is at once returned to normalby field-magnet B and contact-arm D brought into engagement with springd. The circuit from battery K is then closed at this point and throughwires 66 and 67 to the next succeeding relay. hen the circuit througheither of the controlled branch circuits is broken by the makeand breakdevice L, the armature G is returned 'to normal byfield-magnet F. Theapparatus is then in condition to be actuated by the next succeedingline impulse.

It will be understood that various changes may be made in thearrangement and construction of the variousfeatures without de' parturefrom the essentials of the invention.

Having thus described our invention, what.

we claim as new, and desire to secure by Letters Patent, is I 1. Thecombination with a line-circuit and with two independent, separatebranch circuits, of a relay in said line-circuit, means controlled bysaid relay for closing either of said branch circuits, a pair oflocking-magnets, one controlled by each of said branch circuits and ashunt around said circuit-controlling means arranged to be closedbytl'ie operation of said locking-magnets-through the selected branchcircuit.

2. The combination with a line-circuit and with two independent,separate branch circuits, of a'polarized relay in said line-circuitcomprising a pivoted armature having means for controlling said branchcircuits, means for holding said armature in central position with bothof said branch circuits open, means for rocking said armature in one orthe other direction to close either of said branch circuits,

a locking-magnet in each of said branch circuits, means controlled bysaid locking-magnets and a shunt around said circuit-controlling meansarranged to be closed through the selected branch circuit by said means.

3. The combination with. a line-circuit and with-"two independent,separate branch circuits, of a relay in said line-circuit comprising apermanent field-magnet, a pivoted armature held innormal centralposition thereby and means for rocking said armature in one or the otherdirection, a contact-arm controlled by said armature and normally heldthereby out of engagement with the terminals of said separate branchcircuits but arrahged to close either of the latter as said armature isrocked in one IIO.

or the other direction, a locking-magnet in each of said branchcircuits, a common piveted'armature for said tion thereby and a shuntaround said contactarm arranged to be closed through the selected branchcircuit by the movement of said lockin -armature.

' said branch circuits,

4c. The combination with a line-circuit and with two separateindependent branch circuits, ofa relay comprising a permanentfieldrnagnet having two like poles and one unlike pole, an armatureextending in line with and normally held in central position betweensaid like poles and. an electromagnet for rocking said'armature in oneor the other direction, a

contact-arm controlled byfsaid relay-armature and normally held out ofcontact with the terminals of said branch circuits but arranged to closeone or the other of the latter as said armature is moved, alocking-magnet in each of said branch circuits,

a shunt around said contact-arm arranged to be closed through theselected branch circuit by the movement ofsaid locking-armature.

5. The combination with a line-circuit and with two normally open branchcircuitscontrolling receivingdeviceaof means coxitrolled by saidline-circuit for closing either of saidbranch circuits, a locking-magnetin each' of said branch circuits'and a shunt arranged to be closed bysaid locking-magnets through theselected branch circuit.

6. The combination with a line-circuit and with two independent,normally'open branch circuits controlling separate receiving devices,

of a relay controlled by said line-circuit for closing either of saidbranch circuits, a pair of locking-magnets arranged side by side one ineither of said branch circuits, at common centrally-pivoted armaturearranged to be moved in one or the other direction by saidlocking-magnets and a shunt arranged to be closed by the movement ofsaid armature through the selected branch circuit.

Y; The combination with a line-circuit and with two normally open branchcircuits controlling separate receiving devices, of a relay in saidline-circuit arranged to close either of a pair of locking-magnetsarranged side by side, one in either of said branch circuits, commoncentrally-pivoted armature, a permanent field-magnet arranged to holdsaid armature in normal central-position and a shunt arrangedto beclosed by said armature through the selected branch circuit when saidarmature is rocked in one or the other direction by theoperation of saidloclring-magnets.

8. The combination with a line-circuit andwith-two independent, normallyopen branch circuitscontrollingseparate receivingdevices, of meanscontrolled by-said line-circuit for closing either of said branchcircuits, a pair locking-magnets, arranged to be rocked in one or theother d1recacommon centrally-piv- 'oted armature for saidlocking-magnets, and

of locking-magnets, one arranged in either of said branch circuits, acommon plvoted armature normally held in central position, a thirdbranchcircuit ccntrollinga third receiving device and a shunt controlled bysaid pivoted armature and norm ally closed thereby through said thirdbranch circuit but arranged to be broken through said third branch andclosed.

through either of the normally open branches 7 when said armature isrocked in one or theother direction by the operation of said locksaidrelay, a pair of locking-magnets, one con 4 trolled by each of saidbranch circuits and shunt-circults around sald switch-contacts con--trolled respectively by said locking-magnets.

' 11. The combination with a line-circuit and with two independent,separate branch. circuits, of a relay 1n said line-circuit, meansoperated by said relay for controliingsaid branch circuits, a pair oflocking-magnets controlled.

respectively by said separate branch circuits,

a shunt around said circuit-controlling means having switch-contactscontrolled by said locking-magnets and an unlocking-switchin said shunt.

12. The combination with a line-circuit and With two independent,separate branch. cir

cuits, of a relay in said line-circuit, means controlled by said relayfor closing either of said branch circuits, a pair of locking-magnetscon trolled respectively by said separate branch circuits, a shuntaround said circuit-controlling means arranged to be closed by theoperation of said locking-magnets through the selected branch circuitand unlocking switch in said shunt.

13. The combination with a line-circuit and 'with two independent,separate branch circuits, of a polarized relay in said line-circuitcomprising sw tch-contacts for respectively controlling said separatebranch circu1ts,a

locking-magnet in each of said branch circuits, a shunt-circuit aroundthe switch-contacts of said relay, switch-contacts in said shunt-circuitcontrolled by said lochi11g-magnets and an unlocking-switch in saidshuntcircuit.

FRANK PEARNE. CHARLES L. KRI'JM Witnesses:

.Annnnrn Anni/non,

Cmur V. HINES,

